Some good online options, some at low to no cost. Or if you want to really get a formal training then Oracle offers courses. Here are some I would look at, Pluralsight and UDEMY are well respected and have a lot of offerings depending on what you are after.

Featured Post

Enroll today in this bundle of courses to gain experience in the logistics of pen testing, Linux fundamentals, vulnerability assessments, detecting live systems, and more! This series, valued at $3,000, is free for Premium members, Team Accounts, and Qualified Experts.